Variables There are many variables that can affect how much resistance there is in a wire: The length of wire can affect the resistance because longer wires will contain more atoms to interfere with the passing electrons. To increase or decrease the resistance I could also change the amount of volts flowing through the circuit. I could use a different wire, for example the resistance will vary if a copper wire is used as opposed to a Nichrome wire. A copper wire is a better conductor and has less resistance and the Nichrome wire has more resistance. The thickness of the wire can also affect the resistance the thicker the wire is the more easily the electrons will flow through.
I predict this because, the longer a wire is, then the more time it will take for electrons to go through. The resistance also depends on the material and cross-sectional area. As the cross-sectional area increases, the resistance decreases. This is because if the cross-sectional area of a wire is high, then the electrons can pass through quicker than if the wire was thin. The length of the wire will make a difference.
The Resistance of a Wire Investigation Aim: To investigate how changing the length of a wire affects the resistance. Prediction: I predict that the longer the piece of wire, the greater the resistance will be. This is because the current is resisted by the atoms in the wire. In a longer piece of wire, there would be more atoms for the electrons to collide with and so the resistance would be greater. The shorter piece of wire will have less resistance because their will be less particles causing less collision.
This means that the resistance of a metallic conductor is constant providing that the temperature also remains constant. Furthermore, the resistance of a metal increases as its temperature increases. This is because at higher temperatures, the particles of the conductor are moving around more quickly, thus increasing the likelihood of collisions with the free electrons. Variables Input: Length of wire. * Material of wire.
Experiment I Simple Voltage and Current Measurement Objective The objective of this experiment was to measure the Voltage and Current. Upon completion of this experiment I was able to: 1) Set the DC power supply to a specific voltage. 2) Properly connect the voltmeter to measure voltage. 3) Measure current with the ammeter. 4) Measure resistance with the ohmmeter.
This is good because it will cause more collisions between the atoms and the electrons. The increase in collisions would obviously cause the resistance to rise. Secondly, the length of the wire is a factor. The longer the wire, the longer it will take electrons to get to the end of the wire. This is because there will be more collisions between electrons and atoms.
In a series circuit if you add resistors then the resistance increases this is like you are increasing the length. I predicting that when the length doubles the resistance will double. As the length increases the resistance increases because there are more positive ions in the resistance wire for the negatively charged electrons to hit. It takes longer because as the electrons move around the circuit they get energy at the power supply this in creases there energy and they move to the resistance wire were they hit the positive particles, if the wire is longer there will be more particles to hit and vice versa, if the length is short there will be less particles to be hit. Therefore the resistance will increase when the length is longer and decrease when it is shorter Preliminary experiment: In this experiment we used constantan wire to keep the test fair.
These collisions convert some of the energy that the free electrons are carrying into heat. Secondary Sources: · The Internet · Text books · Information from class Prediction: I predict that the longer the wire, the higher the resistance. This is because the longer the wire is, the more times the free electrons will collide with other free electrons and the particles making up the metal. This means that more heat energy is going to be lost in these collisions. I also think that if you double the length of the wire, you will get double the resistance.
Resistance is a measure of how hard it is to move the electrons through the wire. The length of the wire also makes a difference in the resistance because, if the length of the wire is increased then the resistance will also increase as the, electrons will have a longer distance to travel and so more collisions will occur. Due to this the length increase should be proportional to the resistance increase. Metals are good conductors of electricity, which is why the big free group of electrons can get away by applying the voltage. Then if an Ion gets in the way of an electron, and the electron collides with the Ion then the electron, will be slowed down and the Ion will also capture some of its energy.